Results 21 to 30 of about 928,217 (165)
Read the free Plain Language Summary for this article on the Journal blog. Abstract The stoichiometric ratios of carbon (C), nitrogen (N) and phosphorus (P) serve as important indicators for assessing nutrient balance in forest ecosystems, but their relationships with photosynthetic dynamics require deeper characterization.
Minghao Chen +9 more
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本实用新型涉及无人机技术领域,特别涉及一种火炬传递无人机。包括旋翼无人机、火炬倾转机构、电池配重系统及火炬,其中旋翼无人机采用四旋翼构型,电池配重系统布置于旋翼无人机内,火炬倾转机构设置于旋翼无人机的外侧,火炬安装在火炬倾转机构上,并且通过火炬倾转机构的驱动实现倾转动作。本实用新型可实现无人机高载重比 ...
杨丽英 +6 more
core
Conservation Funding at the Local Level 地方层面的保护资金
Direct conservation fund transfer to local communities ensures the involvement of these communities in decision‐making and fund utilisation, which will ultimately lead to effective biodiversity conservation. A Cakchiquel family in the hamlet of Patzutzun, Guatemala, 1993. Credits: John Issac. Source: UNEP‐WCMC Internal Resources.
Jithu K Jose
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本发明涉及无人机技术领域,特别涉及一种火炬对接无人机。包括旋翼无人机、机械臂、视觉引导系统及视觉定位系统,其中机械臂设置于旋翼无人机机身的下方,机械臂用于与目标火炬对接;视觉引导系统设置于旋翼无人机机身的正前方,视觉引导系统用于远距离检测目标火炬的位置;视觉定位系统设置于旋翼无人机的旋翼下方,视觉定位系统用于近距离检测目标火炬的位置。本发明可实现无人机在视觉引导系统引导下的大范围全自主火炬对接 ...
杨丽英 +8 more
core +1 more source
目前多旋翼无人机已在电力系统巡线中得到了广泛应用,结合无人机航迹规划研究现状,提出基于工频电磁场干扰研究的三维GIS无人机巡检航迹规划系统,通过建立导线对无人机工频电场和工频磁场干扰仿真模型,计算工频电磁场对无人机机身及机载设备影响,确定了安全飞行最小安全距离,并以确定的最小安全距离、线路杆塔三维模型及巡检任务相关信息实现在三维GIS上的无人机巡线路径规划、航迹跟踪和手动导航等功能,通过现场实际应用验证了航迹规划对巡检工作的重要性。
冯智慧 +4 more
doaj
Abstract Despite the crucial role of human impacts on biodiversity loss, many assessments of this loss focus on single metrics, such as species richness, and overlook the multidimensional effects of human activities. Because of its importance to ecosystem functioning, we investigated the functional diversity of medium‐ and large‐sized mammal ...
Xueyou Li +8 more
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ABCA12 Frameshift Deletion in Domestic Cats With Ichthyosis Fetalis
ABSTRACT Background Ichthyosis fetalis (IF), also known as harlequin ichthyosis, is a rare and often fatal autosomal recessive congenital skin disorder. It is characterized by thickened, hard skin plaques and deep skin fissures that limit mobility and cause malformations of the eyes, lips and ears.
Jeanna M. Blake +2 more
wiley +1 more source
ABSTRACT Additive manufacturing, commonly referred to as three‐dimensional (3D) printing, provides the geometric freedom and multi‐material integration needed to build soft medical robots for minimally invasive interventions, prosthetics, and rehabilitation.
Yao Wang +5 more
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ABSTRACT Environmental pollution across water, air, and soil systems poses escalating threats to human health and ecosystem stability, driven by heavy metals, persistent organic pollutants, particulate matter (PM), bioaerosols, and toxic gases. Conventional remediation technologies often suffer from limited selectivity, insufficient efficiency, and the
Junjie Qi +6 more
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